for ( $i = 0; $i < 100; $i++ )
    echo crc32(rand(1,10 * $i))."<BR>";

works differently on alpha and intel machines. on intel it outputs values from -2G to 2G, but on alpha 0 to 4G. I dont i`m not sure that its not a feature. I tryd to avoid this by sprintf("%u", crc32(...)) but this doesnt seems to work on alpha (php 4.0.4pl1). Cant upgrade it beacouse thats not my machine to manage.